{"id":1644,"date":"2025-05-01T17:51:46","date_gmt":"2025-05-01T17:51:46","guid":{"rendered":"https:\/\/lwcb.ca\/noticeboard\/?p=1644"},"modified":"2025-05-01T17:51:47","modified_gmt":"2025-05-01T17:51:47","slug":"2025-05-01-level-forecast-and-outflow-increases","status":"publish","type":"post","link":"https:\/\/lwcb.ca\/noticeboard\/2025\/05\/01\/2025-05-01-level-forecast-and-outflow-increases\/","title":{"rendered":"2025.05.01 Level Forecast and Outflow Increases"},"content":{"rendered":"\n

The Winnipeg River basin received above normal rainfall over the last week, with the highest amounts in the 50 to 75 mm (2 to 3 in) range over Lake of the Woods and the Rainy-Namakan basin (see map below). For comparison, average rainfall in the last quarter of April is 10 mm (0.4 in). Some additional bands of rain are forecast today and tomorrow, after which the remainder of the forecast shows warm and dry conditions through the first week of May.<\/p>\n\n\n

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Tributary flows and lake inflows have risen to the top of the normal range and in some locations are peaking well above normal, at 90th<\/sup> percentile for this time of year. The LWCB is referring to its Regulation Strategy<\/a> and using the guidelines for moderate inflow conditions to manage lake levels and flows. At Lake of the Woods, the lake level is rising quickly and will hit the preferred end-of-May level of 322.7 m (1058.7 ft) in the next few days. To slow lake level rise, the Board has scheduled staggered outflow increases over the next week, considering the need to balance rising levels downstream on the Winnipeg River. At Lac Seul, refill is on track to meet preferred mid-May lake levels for fisheries. <\/p>\n\n\n\n

The current level of\u00a0Lake of the Woods<\/a>\u00a0is 322.68 m (1058.6 ft), a 50th<\/sup>\u00a0percentile level, in the normal range for this time of year. The average lake level increased by 12.0 cm (4.7 in) over the last week and is expected to increase by 6 to 8 cm (2.4 to 3 in) over the next week. Lake of the Woods authorized outflow will increase as follows:<\/p>\n\n\n\n